We are using a custom activity (Urban Airship integration) that sends push notifications to our customers. The Custom Activity is hosted on AWS.
We are seeing a throughput of about 6-10 emails per minute with a journey that looks like the following:
Data Extension Entry Source -> 15 min wait -> Split -> Email Send -> Wait 15min -> Urban Airship Custom Activity -> end
When we run the journey it takes half the time of the one with the Custom Activities.
With custom activities - 45k email sends in 24hours Without custom activities - 41k email sends in 12 hours
Any advice on how we can improve this performance would be greatly appreciated.